VINKA DC21 User manual

苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
DC21
VINKA Display
User Manual

1
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
Contents
Product Name and Model..................................................................................................................2
Specifications.....................................................................................................................................2
Appearance and Size.........................................................................................................................2
Button definition.................................................................................................................................3
Function summary and layout............................................................................................................4
◆ Function summary ..................................................................................................................4
◆ Function Layout ......................................................................................................................4
General Operation..............................................................................................................................5
1.Switching the E-bike System On/Off.......................................................................................5
2.Display Interface......................................................................................................................5
3.Switching Push-assistance Mode On/Off................................................................................5
4.Switching the Lighting On/Off..................................................................................................6
5.Assist Level Options................................................................................................................6
6.Battery Indicator.......................................................................................................................7
7.Motor Power Indicator.............................................................................................................7
8.Error Code Indication...............................................................................................................8
9.Trip Distance Clearance..........................................................................................................8
General Settings................................................................................................................................9
1.Backlight Settings....................................................................................................................9
2. Unit settings............................................................................................................................9
3.Wheel Diameter Settings.......................................................................................................10
4.Speed-limit Settings...............................................................................................................10
5.Walk Speed setting...............................................................................................................10
6. software version...................................................................................................................10
Quality assurance and warranty scope:...........................................................................................11
I. Warranty:...............................................................................................................................11
II. Others ...................................................................................................................................11
The following cases do not belong to warranty scope:..........................................................11
Wire connection layout.....................................................................................................................11
Connector wire sequence.........................................................................................................11
Wire sequence table .................................................................................................................11
Warnings:.........................................................................................................................................12
Attached list 1：Error Code Definition.............................................................................................12
Attached list 2：Assist level ratio defaults.......................................................................................12

2
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
Product Name and Model
Intelligent Segment LCD display of E-bike
Model: DC21.
Specifications
● Rated voltage: 24V/36V/48V
Rated working current: 10mA
● Maximum working current: 30mA
● Off-state leakage current: <1uA
● Operating temperature: -20℃~60℃
● Storage temperature: -30℃~ 70℃
Appearance and Size
◆ Display appearance and dimensional drawing (unit: mm)

3
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
Button definition
DC21 has four buttons:
Power button is on the top of the left button.
Light/plus button “+”, MODE button “i”, and minus button “-” are on the
Independent left button. In this manual we use words “ON/OFF”, “UP”, “MODE” and
“DOWN” to represent these 4 buttons.

4
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
Function summary and layout
◆ Function summary
DC21 has many functions to meet the riders’ needs. The indicating elements are as
follows:
● Smart battery indication
● Assist level
● Speed indication (incl. Current speed, max. speed and avg. speed)
● ODO and trip
● The push-assistance function
● Trip time
● The lighting On/Off
● Error code indication
● Motor power
● Range
● Various parameters settings (e.g., wheel size, speed-limited, battery level bar, Assist
level, controller limited current, max speed, password enable, etc.)
● Recover default settings
◆ Function Layout
Functional Area Distribution

5
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
General Operation
1.Switching the E-bike System On/Off
To switch on the E-bike system and provide the power supply to the controller, hold the
On/Off button on the remote for 1 s.
To switch off the E-bike system, hold the On/Off button for 1s. The E-bike system no
longer uses the battery power.
When E-bike system is switched off, the leakage current is less than 1 μA.
■ When the E-bike is parked for over 15 minutes, the E-bike system switches off
automatically.
2.Display Interface
After switching on the E-bike system, the display will show Current Speed and TRIP by
default.
Press “i” button on the remote to switch between the indication functions below:
Trip Distance (Km)→ODO (Km)→Trip Time (min)→Max. Speed (Km/h) →Avg. Speed
(Km/h) → RANGE (Km)
Display interface
3.Switching Push-assistance Mode On/Off
■ To activate the push-assistance function, short press the MODE button and hold the DOWN
button between 3S.The E-bike is activated with a uniform speed while the screen displays
shown “ ”. (Without special settings, the E-bike will start at a constant speed at a standard
speed of 6km/h by default).
■ The push-assistance function will be switched off as soon as you release the DOWN button
and E-bike gets back to the status before the push-assistance is engaged.

6
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
Push-assistance Mode
⬛Push-assistance function may only be used when pushing the E-bike. Be aware of
danger of injury when the wheels of the E-bike do not have ground contact while
using the push-assistance function.
4.Switching the Lighting On/Off
To switch on bike light, hold the UP button for 1s. The lighting icon comes out and display
backlight brightness is automatically reduced.
Likewise, hold the UP button for 1s again, the bike light switches off. The lighting icon is gone
and display resumes backlight brightness.
Switch the Lighting On/Off Interface
5.Assist Level Options
The assist level of the E-bike drive can be changed anytime, even during riding.Press the UP or
DOWN button to switch between the assist levels and change the motor output power
The assist level ranges from 0 to 5 (level 0 to level 5). The default assist level is “1” when the
display is started. The output power is zero on Level “0”. Level “1” is the minimum output power.
Level “5” is the maximum output power.

7
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
Assist Level “5”
6.Battery Indicator
The five battery bars represent the capacity of the battery. Each bar is equivalent to a
capacity of approx. 20%. The five battery bars are bright when the battery is in full voltage.
When the battery is in low voltage, battery frame will flash to give a notice that the battery needs
to be recharged immediately.
7.Motor Power Indicator
Battery Indicator
The power of the motor can be read via below interface.
Motor Power Indication
Flash in low voltage

8
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
8.Error Code Indication
The components of the E-bike system are continuously and automatically monitored.
When an error is detected, the respective error code is indicated in text indication area.
Refer to the detail message of the error codes in Attached list 1.
Error Code Indication
⬛ Have the display inspected and repaired when an error code appears. Or else, you
will not be able to ride the bike normally. Please always refer to an authorized bicycle
dealer
9.Trip Distance Clearance
On the TRIP page, press the DOWN button and the UP button at the same time for
more than 1 second, the indicator enters the TRIP reset function, and at the same
time, the TRIP value is reset to zero.
Trip Distance Clearance Settings Interface

9
苏州万佳电器有限公司
Suzhou wanjia Electric Co.,Ltd.
General Settings
To access Setting interface, hold both the MODE button and the DOWN button
simultaneously for 1s.
All the settings are implemented on a parked bike of no speed.
1.Backlight Settings
The settable range is from Level 1 to Level 5. Level 1 is the darkest, Level 5 is the brightest.
The default value is decided by the controller when the display leaves factory. Press the
UP/DOWN button to change the brightness levels. Press the MODE button to confirm and
exit the settings.
Backlight Brightness Settings Interface
2. Unit settings
U represents unit settings, “1” is mile and “0”is kilometer. The default value is “0”.
Enter the UNIT Type, press the UP or DOWN button to choose the desired setting item,
and then press the MODE button to confirm and store the changed settings.
Mile toggling Settings Inter